Ram air aerial device with lower skin pressure regulator

Details Ram air aerial device with lower skin pressure regulator Ram air aerial device with lower skin pressure regulator

1989-04-21

1990-06-05

Barefoot, Galen

Aeronautics and astronautics

Safety lowering devices

Parachutes

B64D 1702

Patent

active

049307282

ABSTRACT:
A ram air type parachute cell has a leading edge, a trailing edge, two side ribs, a flexible upper skin, and a flexible lower skin. A central rib is disposed substantially centrally between the first and second ribs to divide the cell into a plurality of compartments. The lower sheet includes a first forward skin and a second rearward skin. The rear portion of the first forward skin and the front portion of the second rearward skin form a closable air inlet vent opening into the cell. Each side of the rear portion of the first forward skin is connected at a connection point to the respective rib at a point spaced above the junction of the second rearward skin and the rib. When air pressure inside the cell exceeds the air pressure outside the cell, the rear portion of the first forward skin is forced onto the front portion of the second rearward skin to close the air inlet vent by lying substantially flat on the front portion of the second rearward skin without billowing out of the cell to maintain air pressure inside said cell. When the air pressure outside the cell exceeds the air pressure inside the cell, the rear portion of the first forward skin is forced upwardly away from the front portion of the second rearward skin to open the air inlet vent.

REFERENCES:
patent: Re26427 (1968-07-01), Jalbert
patent: 3285546 (1966-11-01), Jalbert
patent: 3524613 (1970-08-01), Reuter et al.
patent: 3724789 (1973-04-01), Snyder
patent: 3749337 (1973-07-01), Jalbert
patent: 3822844 (1974-07-01), Sutton
patent: 3972495 (1976-08-01), Jalbert
patent: 4191349 (1980-03-01), Pravaz
patent: 4705238 (1987-11-01), Gargano
patent: 4729530 (1988-03-01), Jalbert
patent: 4771970 (1988-09-01), Sutton

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